SSH to Proxmox host

[beckett]

When I try an ssh to proxmox host I get this:
@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@
@ WARNING: REMOTE HOST IDENTIFICATION HAS CHANGED! @
@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@
IT IS POSSIBLE THAT SOMEONE IS DOING SOMETHING NASTY!
Someone could be eavesdropping on you right now (man-in-the-middle attack)!
It is also possible that a host key has just been changed.
The fingerprint for the ED25519 key sent by the remote host is
SHA256:a5OCoJ2vNmpnxriuPuZRD5zqykgQRdszSrG1itv4xh4.
Please contact your system administrator.
Add correct host key in /root/.ssh/known_hosts to get rid of this message.
Offending ECDSA key in /root/.ssh/known_hosts:3
Host key for 192.168.1.203 has changed and you have requested strict checking.
Host key verification failed.

If I use this command I can login
ssh -v root@192.168.1.203
Please advise, thanks.

 

[waltar]

Offending ECDSA key in /root/.ssh/known_hosts:3

Delete 3rd line in known_hosts.

 

[Kingneutron]

ssh-keygen -R # see man page